Paper machinery



- April 16, 1963 Filed Nov. 16. 1960 FIG-1 L. A. MOORE PAPER MACHINERY 5Sheets-Sheet 1 INVENTOR.

LAWRENCE A. MOORE ATTORNEYS April 16, 1963 A. MOORE PAPER MACHINERY 5Sheets-Sheet 2 Filed Nov. 16. 1960 IN VEN TOR.

LAWRENCE A. MOORE m wl ATTORNEYS I 5 Sheets-Sheet 3 Filed Nov. 16, 19604 R E s m m 4 m N Ov R w m m H m c m R M M .L Y ,B My 0% E as E m Tmwflds 8 A m2 (8 @2 5: 0000 82.: 5 ms m oE t E April 16, 1963 A. MOOREPAPER MACHINERY 5 Sheets-Sheet 4 Filed Nov. 16. 1960 FIG-8 FIG-9 IN V ENTOR.

LAWRENCE A. MOORE ATTORNEYS April 16, 1963 A. MOORE 3,085,503

PAPER MACHINERY Filed Nov. 16, 1960 5 Sheets-Sheet 5 INVEN TOR.

LAWRENCE A. MOORE ATTORNEYS 3,085,503 PAPER MACHINERY Lawrence A. Moore,Eeloit, Wis, assignor to The BlacktClawson (Ioinpany, Hamilton, Ohio, acorporation of Ohio Fiied Nov. 16, 1969, Ser. No. 69,748 Claims. (Q1.1(lil90) in the paper making industry where it is often desired toincrease or decrease the number of rolling or treating operations byadding or removing some of the intermediate rolls of the calender. It isthe usual practice to grind or otherwise to form the bottom or king rollwith a fixed crown for the purpose of maintaining a uniform nip betweenthe bottom roll and the roll immediately supported thereon, often calledthe queen roll. Such a fixed crown, however, is suitable for maintaininga uniform nip only with a given operating pressure or weight, such aswith a given number of intermediate rolls supported by the queen roll.The addition or removal of intermediate rolls requires some compensationin the crown of the king roll to effect uniform regulation of the nip.

Another example of the utility of this invention resides in itsapplication to a press section of a paper machine to maintain a uniformnip between the two press rolls over a range of operating pressures, andthe invention is especially applicable to the suction pres-s roll of asuction press section. Use of the invention in a press section resultsin the advantage of uniform water removal from the felt and the newlyformed web of paper, and felt life is also increased as a result ofmaintaining a uniform pressure distribution along the nip.

The invention further includes an arrangement for shifting the highpoint of the crown longitudinally of the roll. This, along with theprincipal roll bending mechanism, provides full control of the nip andth distribution of pressure between a pair of treating rolls.

The mechanism of this invention is particularly suited for installationinto existing machines with a minimum of modification of the machine orthe supporting bed. The roll bending mechanism is self-contained andplaces no unusual stresses on components outside of the machinerequiring special shoring or strengthening. I

It is therefore an object of this invention to provide a self-containedmechanism as outlined above for maintaining a uniform or determinablenip pressure between a pair of treating rolls.

Another object of the invention is to provide an adjustable mechanism asoutlined above which is capable of establishing and maintaining apredetermined crown on the lower roll of a pair of treating rolls at thenip with the cooperating upper roll, and also to provide such amechanism which is capable of effecting longitudinal adjustment of thehigh point of the crown.

A further object of this invention is to provide a compensatingmechanism as outlined above which is applicable to a wide variety oftypes of treating rolls and the installation of which requires nounusual or additional strengthening or support in the machine bed or thebuilding in which it is housed.

Additional objects and advantages of the invention will be apparent fromthe following description, the accompanying drawings and the appendedclaims.

In the drawings 3,085,503- Patented Apr. 16, 1963 "ice FIG. 1 is asomewhat diagrammatic view of an open side calender embodying thepresent invention;

FIG. 2 is an end view of the king roll in the calender of FIG. 1 viewedfrom the right of FIG. 1;

FIG. 3 is an enlarged portion of FIG. 1 partially broken away andshowing some of the details of the invention;

FIG. 4 is a partially broken away vie-w showing the mechanism foradjusting the longitudinal position of the crown;

FIG. 5 is a fragmentary elevational view, partially in section, of asuction press section incorporating the invention;

FIG. 6 is an end view of the suction roll viewed from the left of FIG.5;

FIG. 7 is a fragmentary plan View showing the mounting of the save-allpan for the suction roll of FIGS. 5-6;

FIG. 8 is a fragmentary view in side elevation, partly broken away,showing another construction of suction press roll in accordance withthe invention;

FIG. 9 is an end view looking from left to right in FIG. 8;

FIG. 10 is an elevational view, looking from right to left in FIG. 11,partly broken away, showing a press roll constructed in accordance withthe invention and illustrated in combination with a fragment of a Yankeedryer;

FIG. 11 is an end vie-w looking from left to right in FIG. 10;

FIG. 12 is a view similar to FIG. 3 showing another construction inaccordance with the invention of the king roll in a calender stack; and

FIG. 13 is an end view looking from left to right in FIG. 12.

Referring to the drawings, which illustrate preferred embodiments ofthis invention, a paper calender 10 is illustrated generally in FIG. 1as including a base frame 11 and a pair of upstanding roll supportingframes 12 and 13. The base frame 11 is shown as mounted on bed plates 14and supports a king roll '15 for rotation thereon. A plurality ofadditional rolls are supported for rotation upon the vertical frames 12and 13 with their collective weight supported by the king roll 15. Theseadditional rolls include a queen roll 18 adjacent and in immediatesuperimposed relation to the king roll 15, and a plurality of removableintermediate rolls .19 supported on the queen roll 18 in suitablebearings 20 on the frames 12 and 13. The bed plates 14 of the calender.10 are mounted or supported on a concrete base or floor indicatedgenerally at 21.

The king roll 15 may be ground to a truly cylindrical contour, or it maybe formed with a crown thereon as best shown in FIG. 3. Such crown ofthe roll 15 is readily calibrated to provide a uniform nip 22 betweenthe king roll 15 and the queen roll 18 with a given number of theintermediate rolls 19 supported thereon. For example, the crown of theking roll 15 may be such as to provide a uniform nip 22 with the weightof the queen roll 18 and four intermediate rolls 19 thereon. Theaddition of a greater number of intermediate rolls 19 would have theeffect of deflecting the center of the king roll 15 downwardly and maybe compensated for by effectively increasing the crown of the roll 15.Similarly, a decrease in the number of rolls 19 has the effect ofdeflecting the center of the roll 15 upwardly and may be compensated forby effectively decreasing the crown of the roll 15. This inventionprovides a self-contained mechanism for effecting such an increase ordecrease as required to obtain and maintain a desired and preferablyuniform nip 22, and it is equally applicable to crowned and straightrolls.

The mechanism of this invention is best shown in FIG. 3 as including apair of bearing housings or journal boxes 25, one each positioned ateach end of the roll 15. A pair of trunnion pins 26 (FIG. 2) mounted inradially extending relation on the housing 25 form means for pivotallysupporting each of the housings 25 on the machine bed plate 14 along anaxis transverse to that of the roll 15. The trunnion pins 26 arepivotally received in a pair of roll supporting arms 28 extendingupwardly on the base frame 11. The roll includes journals 29 of reducedcross section at each end thereof which are rotatably supported withinthe housings upon a main bearing 30.

One of the main bearings 30 in the housing 25 may be arranged for theabsorption of lateral thrust, and the right bearing 30 shown isindicated as being positioned between an annular flange 31 on thejournal 29 and an annular retainer 32 on the housing 25 for thispurpose. The extreme ends of the journals 29 are further supported forrotation within the housing 25 by pilot bearings 35 which are arrangedto carry the bending moments effected by this invention. Access to thebearings 30 and 35 may be obtained through an end closure cap 36 on thehousing 25.

A pair of integral depending torque arms 40 and 41 form means connectedto the housings 25 for effecting roll bending movement thereof about thetrunnion pins 26 in the plane containing the axes of the king and queenrolls. The arms 40 and 41 may be conveniently extended through accessopenings 42 in the base 21, and the ends of arms 40 and 41 areinterconnected through a suitable force mechanism such as the hydraulicmechanism 45, for effecting limited pivotal movement of the housings 25within the arms 28 to effect an appropriate deflection of the king roll15. However, it should be understood that the roll 15 need not havepivotally mounted bearing housings provided that the elasticity in theattachment of the housing to the frame is sufficient to provide for thebending of the rolls therethrough.

The mechanism 45 includes a double acting hydraulic motor with thecylinder 46 connected to the arm 40 by means of a push rod 47 and thepiston 50 connected to the opposite arm 41 by means of a push rod 51.Inlets 52 and 53 are provided in the cylinder 45 for admitting hydraulicfluid to either side of the piston 50' for effecting relative movementof the piston 50 and cylinder 46 in either direction, as desired. Thishas the effect of bending the king roll 15 about its longitudinal-axis55 through the rocking movement of the housing 25 on the pins 26, toincrease or decrease the effective crown or curvature of the uppersurface subject to the pressure of the superimposed rolls 18 and 19.This bending movement effected by the mechanism 45 is illustrated in exaggerated form by the positions of the center line 55 in FIG. 3.

Since the mechanism 45 forms a closed loop with the arms 40-41 and theroll 15 for effecting deflection of the roll, no outside reinforcingmembers are required, and the invention is adapted for incorporationwith existing rolling machines with a minimum of modification of thefoundation or other supporting structure. It is within the scope of thisinvention to provide a king roll 15 with a maximum crown formed thereonfor the accommodation of the maximum number of intermediate rolls 19,and then to deflect the arms 40 in one direction only, that isoutwardly, to decrease the effective crown thereof. It is further withinthe scope of this invention to grind the king roll 15 straight and toeffect all of the crowning necessary by means of the mechanism 45, or togrind any intermediate crown desired and accommodate superimposed rollsby suitable deflection.

Means may be connected to the arms 40'for effecting simultaneous lateraldisplacement thereto to shift the high point or apex of the crownlongitudinally along the king roll 15, for example where uneven loadingswould otherwise result in an uneven nip 22 which is not totallycompensated for by means of the mechanism 45. Referring to FIG. 4, anauxiliary hydraulic motor includes a cylinder 61 attached to a fixedwall member 62 by a bracket 63. A piston 65 is connected to actuate thearms 40 and 41 together by a push pin 66 threaded into an extended end67 of the push rod 47. A pair of hydraulic fluid inlets 68 and 69positioned on opposite sides of the piston 65 provide means by which alateral force may be applied to the arms 40 and 41 through the mechanism45 to effect a longitudinal displacement of the apex of the crown on theroll 15, as necessary, to achieve the desired nip 22.

A suitable hydraulic system for applying hydraulic pressure to thecylinder 46 of the mechanism 45 and to the motor 60 to obtain andmaintain a uniform nip 22 is shown somewhat diagrammatically in FIG. 3.The mechanism includes a tank or reservoir of hydraulic fluid 70 and ahydraulic fluid pump 71 connected to supply hydraulic fluid underpressure from the tank 70 to a variable pressure regulating valve 72.The valve 72 is connected to supply hydraulic fluid at a variableregulated pressure to one of the inlets 52 and 53 of the cylinder 46through a four-way selector valve 74 which also vents the unused one ofthe inlets 52-53 to the tank 70. With this hydraulic system, a desiredpressure can be established and maintained on the piston 50 to provide adesired bend in the roll 15 in the manner described. Similarly, theeffective longitudinal position of the apex of the crown is controlledby the motor 60 through a regulating valve 76 and a four-way selectorvalve 77 respectively similar to the valves 72 and 74.

FIGS. 5-7 illustrate the application of the invention to the suctionroll in a suction press section of a paper machine. The suction rollindicated generally at is shown in FIG. 5 partially in section with afragment of a crownless upper press roll 101. The suction roll 100includes a perforated metal shell carried by end heads 106 and 107, andit has a perforated rubber cover 108 forming the outer surface thereof.A felt 110 for supporting a newly formed web of paper is shown aspassing between the rolls 100 and 101, and the return run of the felt isindicated fragmentarily at 110 in the lower portion of FIG. 5.

FIG. 6 shows a fragment of a suction box of conventional constructionwithin the shell 105, and it includes the usual axially extending seals116 which engage the inner surface of the shell 105 to limit theeffective suction area of the roll. FIG. 5 shows a mounting for thesuction box 115 for angular adjustment in the usual way, one end of thesuction box being carried by a stub shaft 117 in bearings 118 in the endhead 106, and the other end being carried by a tubular shaft 120 whichprojects through the head 107 and carries a worm gear 121 meshing withan adjusting drive worm 122. FIG. 5 also indicates at 123 the adjustingmechanism for the usual deckles (not shown) within the suction roll 100.

A pair of journal boxes or bearing housings 125, similar to the boxes25, are positioned at opposite ends of the roll 100, and each includes apair of outwardly extending trunnion pins 126. The pins 126 are eachpivotally received and supported in one of a pair of yokeshapedtrunnions 127 and 128 at the opposite ends of the roll. The trunnion 127is shown as equipped with a removable supporting block 129 which isremoved for replacement of the felt 110, during which operation the lefthand end of the roll may be supported in the usual way by a crane or thelike.

The journal boxes each include a depending torque arm 130 by means ofwhich the roll 100 may be flexed in the plane containing the axes of thetwo rolls 100 and 101. The arms 130 are interconnected similarly to thearms 40 and 41 by a pair of links or rods 131 and 132 and a hydrauliccylinder 135 in the same manner as described for the cylinder 45, andthe cylinder 135 may be provided with a control system of any suitabletype such as that shown in FIG. 2 for the cylinder 45.

F 3 It will be noted that the rods 131132 pass through holes in thetrunnions 127 and 128 above the return flight of the felt 110 tofacilitate replacement of the felt.

In the operation of the invention as illustrated in FIGS. and 6,preferred results are obtained when the hydraulic cylinder 135 isoperated to draw the arms 130 towards each other and and thereby toapply an upward flexing moment to the roll 100. More specifically, andparticularly when the upper press roll is of the crownless constructionshown, preferred results are obtained when the flexing moment is of justsufiicient force to effect accurate straightening of the shell 105,namely to counteract the tendency for the central portion of the shellto be deflected downwardly at its nip with the roll 101.

The arrangement just described provides two major operating advantages.Thus not only does it provide a nip of uniform width throughout theentire length of the roll, but it also provides a uniformly straightinner surface of the shell 105 in the area which is in runningengagement with the suction box seals 116. As a result, the suction ismore nearly uniform throughout the entire width of the roll, and alsothe service life of the seals is correspondingly extended. Additionally,the removal of moisture from the paper web is effectively uniform acrossits entire width, and also wear of the felt is rendered uniform with theresult that its service life is substantially extended.

It is also desirable in accordance with the invention to equip theapparatus of FIGS. 5-7 with an auxiliary hydraulic motor arranged likethe motor 60 in FIGS. 3 and 4, as indicated fragmentarily at 138 in FIG.5. This auxiliary motor makes it possible to shift the apex of theapplied load axially of roll 1% and thereby to control wet streaks inthe paper web which are not uniform across the paper machine. Thus thecylinder 135 will control the entire roll 100, the auxiliary cylinder138 will control the location of the apex of the force applied to theroll by the cylinder 135, and any additional desired control can beeffected by unbalancing the novel loading means (not shown) for the toproll 161. This combination will therefore provide control for allpractical purpose across the entire width of the web.

FIGS. 5-7 show the suction roll 1% as equipped with a save-all pan 140,which is located above the rods 131132 and cylinder 135 to facilitatereplacement of the felt. This save-all pan 140 contributes to operationof the roll flexing mechanism by serving as the tension and compressionmember between the support trunnions 127 and 128. The pan 140 shouldtherefore be of substantially heavier construction than would otherwisebe required, in order to support these tension and compression loads,and it may advantageously include means such as the angles 1411 and 142and connecting plate 143 for attachment to the trunnion supports 127 and128 as shown in FIGS. 6 and 7. These details are subject to designrevision in accordance with convenience and the specific loads to besupported in a given installation.

It is not necessary in the practice of the invention to employ a pivotedtrunnion mounting for the bearing housings of the roll to be bent, andthis is illustrated in FIGS. 8 and 9 showing a press roll constructionin accordance with the invention which is otherwise similar to theconstruction shown in FIGS. 5-7. Thus, in FIG. 8, the suction roll 150corresponds to the roll 166, and its heads 151 and 152 are each mountedby a pair of bearings 153 in bearing housings 155 and 156. These journalboxes are in turn mounted on end cfrarnes 160 and 161 which may havearcuate supporting surfaces 162 on their upper ends which are shown asprovided with removable wear plates 163 forming retaining seats for thebearing housings 155 and 156.

The bearing housings 155 and 156 are provided with depending arms 165and 166 respectively. A fluid pressure cylinder 170 is mounted on thearm 165, and its piston rod 171 is connected by a link 172 with the arm166 to produce the desired movement of the arms and 166 toward and awayfrom each other and thereby to effect controlled bending of the roll150. During such movements, the journal boxes 155 and 156 are free torock on the wear plates 163, which may be of straight section as shown,or may be slightly curved in the manner of a spherical bearing. {Theposition of the high point of the crown of roll 150 may be shifted asdescribed in connection with FIGS. 1 and 4 by means of a second pressurecylinder 175 which is also mounted on the arm 165 and has its piston rod176 connected at 177 to the end frame 160.

FIGS. 10 and 11 illustrate the application of the invention to the pressroll 180 which cooperates with a Yankee dryer drum 181 to effect firmcontact between the drum and the web carried thereto by a felt 182running over one or more guide rolls 183, and which may be either aplain press roll or a suction press roll. The bearing housings 185 and186 for the roll 18!) correspond in structure and function to thehousings 155 and 156, and they rest in a pair of arms 187 which are inturn pivoted at 188 on columns 189 located adjacent either end of thedryer drum 181. Jack cylinders 190 are connected as shown to raise andlower the arms 187 and thereby to control the nip pressure between theroll 180 and drum 181.

.The press roll 18!) is provided, in accordance with the invention, withmeans for varying its crown in a manner similar to that described inconnection with the other rolls in FIGS. l-9. Each of the bearinghousings 185 and 186 includes a depending arm 195, and a pressurecylinder 1% is mounted on one of these arms and has its piston rod 197connected by a link 198 with the other arm 195. As the cylinder 196 isoperated to move the arms 155 toward or away from each other, thebearing housings 185 and 186 are caused to rock in the arms 187, thesupporting connection between each bearing housing and its associatedarm being similar to that between the housings 155 and 156 and the endframes 160 and 161.

FIGS. 12 and 13 show a mounting for the king roll 2% of a calender stackwhich is in all material respects the same as the arrangement shown inFIGS. 1-3, except that the bearing housings 202 for the roll journalsare mounted in cradle-like supports 205 in which they are free to rockas required in the practice of the invention in the same manner asdescribed in connection with FIGS. 8-11. This controlled rocking iseffected through the arms 205 which depend from each bearing housing andare connected through the link 206 which is pivoted to one of the arms205 and has its other end connected to the piston rod of a fluidpressure cylinder 207 mounted on the other arm 2-65. One or the other ofthe arms 205 may also be provided with a connection to a second cylindersimilarly to and for the same purpose as described in connection withthe cylinder 60.

rWhile the forms of apparatus herein described constitute preferredembodiments of the invention, it is to be understood that the inventionis not limited to these precise forms of apparatus, and that changes maybe made therein without departing from the scope of the invention whichis defined in the appended claims.

What is claimed is:

1. In a rolling machine having a pair of rolls operating together underpressure, a mechanism for effecting controlled crowning of one of saidrolls and longitudinal position shifts of the apex of such crown,comprising a lever arm extending from each end of said crowned roll andconnected thereto to effect longitudinal bending moments therein, meansconnecting the ends of said arms for movement in the same direction, andmeans connected to effect said movement of said arms to effect alongitudinal shift in the apex of said crowned roll.

2. In a rolling machine having a crowned roll and a second rolloperating together under pressure, a mech- 7 anism for effectinglongitudinal position shifts of the apex of the crown in said crownedroll, comprising a lever arm extending from each end of said crownedroll and connected thereto to effect longitudinal bending momentstherein, means connecting the extended ends of said arm one to the otherfor movement together, and

and away from each other to effect a bend in said one roll in the planecontaining the axes of said pair of rolls, and an auxiliary hydraulicmotor connected to efiect simultaneous movement of said arms throughsaid first motor to shift said bend longitudinally of said one roll.

4. Mechanism for regulating the nip between a pair of treating rolls,comprising a pair of journal boxes rotatably supporting opposite ends ofone of said rolls, means mounting said boxes for pivotal movement aboutan axis transverse to said one roll, a pair of lever arms connected tosaid boxes respectively for effecting said pivotal movement thereof, afirst double acting hydraulic motor interconnecting said lever arms foreffecting relative movement thereof toward and away from each other toeffect a bend in said one roll in the plane containing the axes of saidpair of rolls, and an auxiliary double acting hydraulic motor connectedto effect simultaneous movement of said arms through said first motor toshift said bend longitudinally of said one roll.

5. A calender comprising a bottom king roll having a queen rolland aplurality of removable intermediate rolls supported thereon, said kingroll having a crown formed therein of sufficient height to provide auniform nip between said king and queen rolls with a given number ofsaid intermediate rolls supported thereon, means for flexing said kingroll in a direction to increase and decrease said crown to accommodategreater and fewer numbers respectively of said intermediate rollsincluding a pair of journal boxes rotatably supporting opposite ends ofsaid king roll, means mounting said boxes for pivotal movement about anaxis tnansverse to said king roll, a pair of lever arms connected tosaid boxes respectively for effecting said pivotal movement thereof, adouble acting hydraulic motor interconnecting said lever arms foreffecting relative movement thereof in a direction to increase saidcrown to accommodate a greater number of said intermediate rolls and inthe opposite direction to decrease said crown to accommodate a fewernumber of said intermediate rolls whilelmaintaining said uniform nip,and means connected to said arms for effecting simultaneous lateraldisplacement thereof to shift the apex of said crown longitudinally ofsaid king roll.

6. A suction press section comprising a suction roll, a press rollcooperating with said suction roll to define a nip for processing anewly formed web of paper therebetween, means for flexing said suctionroll to maintain a predeterminedpressure distribution along the lengthof said nip including a pair of journal boxes rotatably supportingopposite .ends of said suction roll, a pair of lever arms connected tosaid boxes respectively for effecting a bending moment in said suctionroll upon relative movement thereof, means interconnecting said leverarms for movement toward and away from each other to effect said bendingmoment therethrough in said suction roll, and means connected to causecontrolled movement of said arms in the same direction and thereby toeffect a shift in the apex of said bending moment longitudinally of saidsuction roll.

7. In a machine including a pair of treating rolls operating togetherunder pressure, the combination of frame means including a pair of endstands for supporting said rolls, bearing means journaling opposite endsof one of said rolls and including a single bearing housing at each endof said roll, means supporting said housings directly on said end standsfor limited rocking movement in the vertical plane containing the axisof said one roll in such manner that the weight of said roll istransferred through said rockable housings to said end stands, a leverarm extending generally radially from each of said bearing housings, andmeans including a motor operatively interconnecting said lever arms toeffect relative movement thereof in said vertical plane causing bendingof said one roll in said plane.

8. In a machine including at least two treating rolls operating togetherunder pressure, the combination of frame means including a pair of endstands for supportsaid rolls, bearing means journaling opposite ends ofone of said rolls and including a single bearing housing at each end ofsaid roll, at least one additional roll supported on said one roll,means supporting said housings directly on said end stands for limitedrocking movement in the vertical plane containing the axis of said oneroll in such manner that the weight of all of said rolls is transferredthrough said rockable housings to said end stands, a lever arm extendinggenerally radially from each of said hearing housings, and meansincluding a motor operatively interconnecting said lever arms to effectrelative movement thereof in said vertical plane causing bending of saidone roll in said plane.

9. A multi-nip calender comprising a calender frame, a stack of calenderrolls in the frame including a bottom roll and a plurality ofsuperimposed rolls including a top roll all in a generally verticalplane, allochiral pairs of bearings rotatably carrying the ends of thebottom roll, fixed pivots on said frame mounting each of said pairs ofbearings, allochiral lever arms rigid with each of said pairs ofbearings and extending therefrom to terminate generally in the plane ofthe superimposed stack of rolls, and means for acting on the terminalportions of each of said lever arms and applying a bending moment toeach such roll end to effect a predetermined deflection in the roll axisand a predetermined loading across the calender rnps.

10. In a mounting for a roll whose axis is subject to deflection, saidroll having shaft elements at opposite ends thereof and being mounted ina calender stack disposed in a generally vertical plane, in combination,allochiral pairs of bearings rotatably receiving said shaft elements andadapted to apply a force couple thereto, fixed pivots mounting each ofsaid pairs of bearings, allochiral lever arms each rigid with one ofsaid pairs of bearings and extending therefrom in said vertical planeaway from the stack, and means for acting on the terminal portions ofeach of said lever arms generally in the plane of the stack to applysuch force couple to said shaft elements,

References Cited in the file of this patent UNITED STATES PATENTS2,191,144 Hornbostel Feb. 20, 1940 2,611,150 Goulding Sept. 23, 19522,825,217 Byrd Mar. 4, 1958 2,850,952 Hornbostel Sept. 9, 1958 2,897,538Shapiro et al. Aug. 4, 1959 FOREIGN PATENTS 747,347 Great Britain Apr.4, 1956

7. IN A MACHINE INCLUDING A PAIR OF TREATING ROLLS OPERATING TOGETHERUNDER PRESSURE, THE COMBINATION OF FRAME MEANS INCLUDING A PAIR OF ENDSTANDS FOR SUPPORTING SAID ROLLS, BEARING MEANS JOURNALING OPPOSITE ENDSOF ONE OF SAID ROLLS AND INCLUDING A SINGLE BEARING HOUSING AT EACH ENDOF SAID ROLL, MEANS SUPPORTING SAID HOUSINGS DIRECTLY ON SAID END STANDFOR LIMITED ROCKING MOVEMENT IN THE VERTICAL PLANE CONTAINING THE AXISOF SAID ONE ROLL IN SUCH MANNER THAT THE WEIGHT OF SAID ROLL ISTRANSFERRED THROUGH SAID ROCKABLE HOUSINGS TO SAID END STANDS, A LEVERARM EXTENDING GENERALLY RADIALLY FROM EACH OF SAID BEARING HOUSINGS, ANDMEANS INCLUDING A MOTOR OPERATIVELY INTERCONNECTING SAID LEVER ARMS TOEFFECT RELATIVE MOVEMENT THEREOF IN SAID VERTICAL PLANE CAUSING BENDINGOF SAID ONE ROLL IN SAID PLANE.